When i’m riding long trips with my phone for navigation, i drain the battery pretty fast. On my Kreidler i have a 12V 80W system, more than enough power to charge my phone. But most of my other mopeds can only provide 6V and 17-18W. I’ve found a solution to charge a USB device that is ready to buy and mount. It’s a german made bicycle dynamo adapter, the model number is M172N and it’s made by a company called Kemo.
It’s rated at 0,8A charging current and it’s able to take an input voltage of 6-70VAC.
I have it mounted on my Vespa Bravo at the moment and it works great. You obviously need to turn the lights of to charge. The stock ignition only makes 18W and i have a 15W and 4W bulb connected.
Next Vespa Bravo upgrade, a Polini Speed Engine. A very nice engine case with enlarged intake and bored to accept 46 mm cylinder kits. Nothing you can’t achieve on a stock engine case, but i got it for a good price from my friend Nikolaj.
I bought a special intake manifold from Italy, made for a 15-16 mm SHA instead of the normal Piaggio SHA 13 mm carburetor.
I mounted the engine with a used original crankshaft, new bearings and seals. The intake opens 130° before TDC and closes again 51° after TDC, giving me a total duration of 181°. Good for many of the cylinders that are out there.
I thought i didn’t need more mopeds for now, but then a old friend messaged me. He had this Vespa Bravo that he couldn’t get done. Everything was disassembled, engine and everything. The price was ok and included delivery, so i felt it was my duty to save this (once) fine Moped.
My first plan was to assemble everything as is, but the paintjob is just terrible . Everything is sprayed over, it needs a new paintjob.
The engine got a quick cleanup, new bearings and seals. The crankshaft was a bit abused, i’m giving it a chance. I’m running a original cylinder, the inlet timing and restriction are modified a bit. Just enough to pull a grown man, no racing engine… yet!
More information is found in the image descriptions, i will update the galleries with additional pictures when i get more work done.